The typhoid carrier.
D000667:Ampicillin / Q000627:therapeutic use; D002353:Carrier State; D002701:Chloramphenicol / Q000627:therapeutic use; D002763:Cholecystectomy; D006801:Humans; D014435:Typhoid Fever / Q000517:prevention & control*; D014481:United States
D002701:Chloramphenicol; D000667:Ampicillin